Hifonics OLM800D4

12" · 8 Ω · 800 W · 84.9 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	29 Hz
Qts	0.525
Qes	0.566
Qms	7.177
Vas	41 L
Sd	452 cm²
Xmax	7.5 mm
Re	7.2 Ω
Bl	22.1 T·m
Mms	210.6 g
Pe	800 W
Sensitivity	84.9 dB

Alignment hint

EBP	51 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 50.4 L

EBP 50-100: works in either a sealed or ported alignment.

Rules of thumb from T/S parameters only. Verify against a real simulation before cutting wood.

Substitute candidates

Driver	Fs (Hz)	Qts	Vas (L)	Xmax (mm)	Sens (dB)	Fit	Notes	Compare
Alpine SWR-1242D 12	29 =	0.47 -0.06	45 +4	9.1 +1.6	85.7 +0.8	close		+
Alpine SWX-1243D Type-X	29 =	0.59 +0.06	38 -3	10.8 +3.3	84.2 -0.7	close		+
JL Audio 12TW3-D4	26.5 -2.5	0.531 +0.01	48.7 +7.7	7.9 +0.4	83.4 -1.5	close	16 Ω vs 8 Ω: amp load changes · 400 W vs 800 W: lower power handling	+
JL Audio 12TW1-4	32.35 +3.35	0.529 =	33.67 -7.33	10 +2.5	85.15 +0.25	close	4 Ω vs 8 Ω: amp load changes · 300 W vs 800 W: lower power handling	+
Rockford Fosgate T0D412	26 -3	0.529 =	55.1 +14.1	10.7 +3.2	85.3 +0.4	usable		+
Rockford Fosgate P3D4-12	27.7 -1.3	0.517 -0.01	57.7 +16.7	9.4 +1.9	86.3 +1.4	usable	600 W vs 800 W: lower power handling	+
DD Audio 712D4 v2022	28.3 -0.7	0.434 -0.09	39.6 -1.4	7 -0.5	87.7 +2.8	usable	600 W vs 800 W: lower power handling · Xmax 7 mm < 7.5 mm: lower excursion-limited SPL	+
Ground Zero GZRW 12XD-AL	29 =	0.451 -0.07	52 +11	9.2 +1.7	86.1 +1.2	usable	500 W vs 800 W: lower power handling	+
Focal E30KX	29 =	0.454 -0.07	50 +9	10.7 +3.2	86.9 +2	usable		+
Focal SUB30KXE	29 =	0.454 -0.07	50 +9	10.8 +3.3	86.9 +2	usable		+

Compare the closest 3 against the OLM800D4 →

Ranked on parameter similarity only (Qts, Fs, Vas, Xmax, sensitivity). Same nominal size required. A hint, not a simulation, model the swap before cutting or buying.

Used in enclosures (0)

No enclosure in the catalog uses this driver yet.